berg[7], gerb[7], beug[7], buge[7], burg[7], grub[7], bure[6], guru[5],
beg[6], geb[6], bug[6], erb[5], erg[4], ger[4], reg[4], gur[4], reu[3], ure[3],
er[2], re[2], ur[2],
